Quiz #1 Color

Discussion in 'US Coins Forum' started by Insider, Sep 28, 2023.

  1. Insider

    Insider Talent on loan from...

    The color we see on coins is very important for both grading and authentication. Please write a brief description of this coin's colors.


    What caused it?
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  3. Mr. Numismatist

    Mr. Numismatist Strawberry Token Enthusiast

    The coin has a nice gold color except for those brown flecks near the rim and above the "1" and "9" in 1912.
    I believe they're called copper spots and are caused by a not fully mixed alloy.
  4. Randy Abercrombie

    Randy Abercrombie Supporter! Supporter

    Whenever I see red on a gold coin I have always believe that was a reaction of the copper in the alloy doing what copper does over time.

    GDJMSP Numismatist Moderator

    The brown looks more like a foreign material that got on the coin to me - not what are commonly called copper spots. What it is or how it got there, I have no idea, but I don't think they're copper spots.
  6. Anthony Mazza

    Anthony Mazza Well-Known Member

    Looks like copper spots to me.
  7. Insider

    Insider Talent on loan from...

    Hardly anyone around here follows instructions. There is a good reason that we all should get into the habit of describing something we see on a coin to ourselves. It would eliminate a lot of guesses and train our minds to be critical. Let's use the guy who is older than dirt around here For example:

    GDJMSP, posted: "The brown looks more like a foreign material [with uneven borders, different intensity, and odd shapes on top of the surface] that got on the coin to me. Grandpa implied my words in brackets because he is not a novice - the members my quizzes are for.

    Now, anyone who guessed "spot" should look up definition #1 in the dictionary. Those ARE NOT SPOTS! What are they? Beats my five aces BUT this exact residue is often found on gold coins that come from the ocean or have been buried. Because of the reddish-brown color, I'm going to bet it is an iron residue.
    Dynoking and GoldFinger1969 like this.
  8. Mr.Q

    Mr.Q Well-Known Member

    It'sa ca-ca froma da fisha mama sa.
    Mainebill likes this.
  9. Anthony Mazza

    Anthony Mazza Well-Known Member

    ......mmkay... the image of the coin in question appears to have an improperly mixed planchet which has its surface copper toned to a medium brown....
  10. Joshua Lemons

    Joshua Lemons Well-Known Member Supporter

    I happen to have owned,in the past, a few medals that were guilded brass that have had this same look when the guilding wore off.
  11. Kentucky

    Kentucky Supporter! Supporter

    Rust from being in contact with iron
  12. Mainebill

    Mainebill Bethany Danielle

    Oxidized iron or other foreign material on the surface of the coin
  13. BadThad

    BadThad Calibrated for Lincolns

    Should come off with an EDTA solution.
  14. Mr.Q

    Mr.Q Well-Known Member

    After all you're ranting about our guesses @BadThad, guess what, you guessed too!
  15. Insider

    Insider Talent on loan from...

    :rolleyes: This smacks of jealousy. After all, this is a guessing game for everyone.
  16. Insider

    Insider Talent on loan from...

    There is always one. :( This is nonsense.

    At least @BadThad posted his opinion. Class clowns are one of the reasons I stopped posting quizzes.
    Mr.Q likes this.
  17. johnmilton

    johnmilton Well-Known Member

    Most spots on gold coins are copper spots. They are the result of a less than perfect mixing of the copper alloyed with gold. It turns brown, just like the copper in a bronze cent.

    The spots on this piece are odd, however. They don’t look like the usual copper spots I have seen. It looks like some foreign material was on the flan when the coin was struck.

    This leads the reason why some modern gold coins, which are supposed to be .999 gold, have red spots. Could it be something the mint used to wash the planchets that was not fully rinsed?
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